Finding the Fourth Proportional to 261.99, 392.78 and 180.99
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Solution
The fourth proportional to 261.99, 392.78 and 180.99 is: 271.34
Step by Step Solution
- Step 1: Write the proportion equation
261.99 : 392.78 = 180.99 : x - Step 2: Convert to fraction form
261.99/392.78 = 180.99/x - Step 3: Cross multiply
261.99x = 392.78 × 180.99 - Step 4: Simplify right side
261.99x = 71,088.35 - Step 5: Solve for x
x = 71,088.35/261.99 - Step 6: Final answer
x = 271.34
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.